|
ACQUISITIONS (Pro Forma) (Details) (USD $)
|
12 Months Ended |
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
| Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |
|
|
|
| Pro forma total revenues |
$ 254,957,000 |
$ 203,093,000 |
$ 167,671,000 |
| Pro forma net income |
40,661,000 |
32,167,000 |
54,405,000 |
|
Limited partners, Common
|
|
|
|
| Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |
|
|
|
| Pro forma EPU, basic and diluted |
$ 0.74 |
$ 0.29 |
|
|
Subordinated units
|
|
|
|
| Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |
|
|
|
| Pro forma EPU, basic and diluted |
$ 0.74 |
$ 0.29 |
|
|
Acquisition-related Costs
|
|
|
|
| Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |
|
|
|
| Pro forma effect of nonrecurring transaction costs incurred on net income |
2,500,000 |
|
|
|
Bison Midstream and Mountaineer Midstream
|
|
|
|
| Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |
|
|
|
| Incremental borrowings on revolving credit facility |
310,000,000 |
|
|
| Pro forma total revenues |
60,323,000 |
0 |
|
| Pro forma net income |
(457,000) |
0 |
|
|
Grand River Gathering, LLC
|
|
|
|
| Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |
|
|
|
| Pro forma total revenues |
|
|
12,824,000 |
| Pro forma net income |
|
|
$ 2,660,000 |